<template>
  <el-container class="home-container">
    <!-- 头部区域 -->
    <el-header>
      <div>
        <img src="../assets/heima.png" alt="">
        <span>网站管理后台</span>
      </div>
      <el-button type="infor" @click="logout">退出</el-button>
    </el-header>
    <!-- 主体区域 -->
    <el-container>
      <!-- 左侧区域 -->
      <el-aside :width="isCollapse ? '64px': '200px'">
        <!-- 左侧菜单栏 -->
        <div class="toggle-button" @click="toggleCollage">|||</div>
        <el-menu background-color="#333744" text-color="#fff" active-text-color="#409EFF" unique-opened :collapse="isCollapse" :collapse-transition="false" router :default-active="activePath">
          <el-submenu :index="item.id + ''" v-for="item in menuList" :key="item.id" >
            <template slot="title">
              <!-- 图标 -->
              <i :class="iconObj[item.id]"></i>
              <!-- 文本 -->
              <span>{{item.authName}}</span>
            </template>
            <el-menu-item :index="'/' +subItem.path" v-for="subItem in item.children" :key="subItem.id" @click="saveNavStatus('/' +subItem.path)">
              <i class="el-icon-menu"></i>
              <span>{{subItem.authName}}</span>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
      <el-main>
        <!-- 路由占位符 -->
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
  export default {
    data() {
      return {
        // 是否折叠
        isCollapse: false,
        activePath: '',
        menuList: [],
        iconObj: {
          125: 'iconfont icon-user',
          103: 'iconfont icon-tijikongjian',
          101: 'iconfont icon-shangpin',
          102: 'iconfont icon-danju',
          145: 'iconfont icon-baobiao'
        }
      }
    },
    created() {
      this.getMenuList()
      this.activePath = window.sessionStorage.getItem('activePath')
    },
    methods: {
      logout() {
        window.sessionStorage.clear()
        this.$router.push('/login')
      },
      // 获取所有菜单
      async getMenuList() {
        const {
          data: res
        } = await this.$http.get('menus')
        console.log(res)
        if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
        this.menuList = res.data
      },
      // 菜单折叠切换
      toggleCollage () {
        this.isCollapse = !this.isCollapse
      },
      // 链接激活
      saveNavStatus (activePath) {
        window.sessionStorage.setItem('activePath', activePath)
        this.activePath = activePath
      }

    }
  }
</script>

<style lang="less" scoped="scoped">
  .el-header {
    background-color: #373d41;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-left: 0;

    >div {
      color: #fff;
      font-size: 20px;
      display: flex;
      align-items: center;
    }

    span {
      margin-left: 15px;
    }
  }

  .el-aside {
    background-color: #333744;
    .el-menu {
      border-right: none;
    }
  }

  .el-main {
    background-color: #eaedf1;
  }

  .home-container {
    height: 100%;
  }
  .iconfont{
    margin-right: 10px;
  }
  .toggle-button{
    background-color: #4A5064;
    color: #fff;
    line-height: 24px;
    text-align: center;
    letter-spacing: 0.2em;
    cursor: pointer;
  }
</style>
